Is it possible to determine the line number that calls a function without the aid of a macro?
Consider this code:
#include <iostream>
#define PrintLineWithMacro() \
std::cout << "Line: " << __LINE__ << std::endl; // Line 4
void PrintLine()
{
std::cout << "Line: " << __LINE__ << std::endl; // Line 8
}
int main(int argc, char **argv)
{
PrintLine(); // Line 13
PrintLineWithMacro(); // Line 14
return 0;
}
which outputs the following:
Line: 8
Line: 14
I understand why each prints what they do. I am more interested if it's possible to mimic the macro function without using a macro.
I would do the following:
#define PrintLine() PrintLine_(__LINE__)
void PrintLine_(int line) {
std::cout << "Line: " << line << std::endl;
}
I know that this doesn't completely remove the preprocessor, but it does move most of the logic into an actual function.
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